Packages


library(dplyr)
library(ggcorrplot)
library(ggpubr)
library(patchwork)
# library("here")
# library("bookdown")
# library("downloadthis")
library(vegan)
library(plyr)
library(e1071)
library(tidyverse)
library(viridis)
library(GGally)
library(ggrepel)
library(readr)
library(RColorBrewer)
library(oce) 
library(plotly)
library(purrr)
library(furrr)

#install_github("jfq3/ggordiplots")
library(ggordiplots)


source("gg_ordisurf_viridis.R")

LOAD OBJECTS IF HAVE RUN ALREADY

geodist_pa<-readRDS(file.path(dataPath,"inputs/Barents_geodist_pa.rds"))
geodist_r6<-readRDS(file.path(dataPath,"inputs/Barents_geodist_r6.rds"))

mds_pa<-readRDS(file.path(dataPath,"inputs/Barents_mds_pa.rds"))
mds_r6<-readRDS(file.path(dataPath,"inputs/Barents_mds_r6.rds"))
#mds_r6_1000<-readRDS(file.path(dataPath,"inputs/Barents_mds_r6_1000rep.rds"))

ep<-0.8 #epsilon (to avoid having to find and run just this line from code blocks where the mds objects were made)

Data

env_sort <- read.csv(file.path(dataPath,"inputs/SPLITS/BARENTS/LDnoSBhi02_env_sort_2022-09-29.csv")) %>% as.data.frame
otu_sort <- read.csv(file.path(dataPath,"inputs/SPLITS/BARENTS/LDnoSBhi02_otu_sort_2022-09-29.csv")) %>% as.data.frame


#must be same length and equal to unique sample number length - the ordered lists are assumed to be directly relatable on a row by row basis

joinedDat<- left_join(env_sort,otu_sort, by=c("SampID"="SampID"))
joinedDat1<-subset(joinedDat, bathy <= -99)
summary(joinedDat1$bathy)
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
 -498.5  -289.4  -251.7  -251.4  -204.5  -100.4 
env_sort<-joinedDat1 %>% select(c(2:351))
otu_sort<-joinedDat1 %>% select(c(2,352:491))

remove any variables with not enough coverage


env_sort <- env_sort %>% select(-c("BO22_lightbotmean_bdmean",
                               "BO22_lightbotltmax_bdmean",
                               "BO22_lightbotltmin_bdmean",
                               "BO22_lightbotrange_bdmean"))

Plot map to check location of samples

env_sort_locations<- ggplot(data = env_sort,
                      aes(x = X.y,
                          y = Y)) +
  theme_classic() +
  geom_point(aes(colour = bathy),
             size = 2) +
  scale_colour_gradient2(low = "red",
                         mid = "yellow",
                         high = "green") +
  ggtitle("Location of samples in sorted env file")

env_sort_locations

Data cleaning

## Removing NAs
otuCompl <- otu_sort[complete.cases(env_sort[, -c(1:which(colnames(env_sort)=="bathy")-1)]), ] # make sure we have the columms 
envCompl <- env_sort[complete.cases(env_sort[, -c(1:which(colnames(env_sort)=="bathy")-1)]), ]

## Removing observations with less than 4 OTUs
sel <- rowSums(otuCompl[, -c(1:2)]) >= 4
otuSel <- otuCompl[sel, ]
envSel <- envCompl[sel, ]


## Removing phosphate
#envSel <- envSel %>% select(-phosphate_mean.tif)


dim(otuSel); dim(envSel)
[1] 977 141
[1] 977 346

Show what samples are left after complete cases and >4 OTUs filters

env_sel_locations<- ggplot(data = envSel,
                      aes(x = X.y,
                          y = Y)) +
  theme_classic() +
  geom_point(aes(colour = bathy),
             size = 2) +
  scale_colour_gradient2(low = "red",
                         mid = "yellow",
                         high = "green") +
  ggtitle("Location of samples in sorted env file")

env_sel_locations

Show what got removed in complete cases filter

envCompl_ccrem<-env_sort%>%filter(!SampID%in%envCompl$SampID)

envCompl_ccrem_locations<- ggplot(data = envCompl_ccrem,
                      aes(x = X.y,
                          y = Y)) +
  theme_classic() +
  geom_point(aes(colour = bathy),
             size = 2) +
  scale_colour_gradient2(low = "red",
                         mid = "yellow",
                         high = "green") +
  ggtitle("Location of removed complete case samples resulting in envSel file")

envCompl_ccrem_locations

Show what got removed in <4 OTUs filter

inv.sel <- rowSums(otuCompl[, -c(1:2)]) < 4
env.invSel <- envCompl[inv.sel, ]

env.invSel_locations<- ggplot(data = env.invSel,
                      aes(x = X.y,
                          y = Y)) +
  theme_classic() +
  geom_point(aes(colour = bathy),
             size = 2) +
  scale_colour_gradient2(low = "red",
                         mid = "yellow",
                         high = "green") +
  ggtitle("Location of removed samples with <4 OTUs resulting in envSel file")

env.invSel_locations

[Optional] Data thinning

# otu_red <- otu1[1:500, ]
# otu <- otu_red
# 
# env_red <- env[1:500, ]
# env <- env_red

Whole dataset for first run


otu<-otuSel[,-c(1: which(colnames(otuSel)=="Lithodidae")-1)]
env<-envSel[,-c(1: which(colnames(env_sort)=="bathy")-1)]

table(is.na(otu))

 FALSE 
136780 
table(is.na(env))

 FALSE 
321433 
#str(otuSel)
#str(envSel)

Splitting in subsets

# ## Class 1
# otu1 <- subset(otuSel, envSel$SplitRev == 1)
# env1 <- envSel %>% filter(SplitRev == 1)
# 
# ## Class 2
# otu2 <- subset(otuSel, envSel$SplitRev == 2)
# env2 <- envSel %>% filter(SplitRev == 2)
# 
# ## Class 4
# otu3 <- subset(otuSel, envSel$SplitRev == 3)
# env3 <- envSel %>% filter(SplitRev == 3)
# 
# ## Class 4
# otu4 <- subset(otuSel, envSel$SplitRev == 4)
# env4 <- envSel %>% filter(SplitRev == 4)
# 
# ## Class 6
# otu6 <- subset(otuSel, envSel$SplitRev == 6)
# env6 <- envSel %>% filter(SplitRev == 6)
# 
# ## Class 7
# otu7 <- subset(otuSel, envSel$SplitRev == 7)
# env7 <- envSel %>% filter(SplitRev == 7)
# 
# ## Class 8
# otu8 <- subset(otuSel, envSel$SplitRev == 8)
# env8 <- envSel %>% filter(SplitRev == 8)

Selecting subset

# ## Selecting 
# otu <- otu2
# env <- env2

format data correctly

#env$coords.x1<-as.numeric(env$coords.x1)
#env$coords.x2<-as.numeric(env$coords.x2)

Abundance weighting

Make function You might have to drop variables that have been imported as character


otu_pa <- decostand(x = otu[, -c(1)],
                    method = "pa")

# y = ax^w         # power transformation formula
dt <- otu[, -c(1:2)]          # species data to transform
x_mn <- min(dt[dt > 0])
x_mx <- max(dt)
rng <- 6           # abundance range
w <- log(rng) / (log(x_mx) - log(x_mn))
a <- x_mn^(-w)
# otu_6 <- a * dt[, -c(1:3)]^w
otu_6 <- a * dt^w
range(otu_6)
[1] 0 6

Ordination methods

DCA PA

Sys.time()
[1] "2022-09-29 18:25:00 CEST"
dca_pa <- decorana(veg = otu_pa)
Warning: some species were removed because they were missing in the data
print(dca_pa, head=T)

Call:
decorana(veg = otu_pa) 

Detrended correspondence analysis with 26 segments.
Rescaling of axes with 4 iterations.

                  DCA1   DCA2   DCA3   DCA4
Eigenvalues     0.4930 0.3926 0.2994 0.2039
Decorana values 0.8128 0.3817 0.2571 0.2339
Axis lengths    3.6589 4.0737 3.5442 2.8505

GNMDS PA

Distances - don’t run if loading saved object

## Bray-Curtis
dist_pa <- vegdist(x = otu_pa, method = "bray")

## Geodist
ep <- 0.8     # epsilon
geodist_pa <- isomapdist(dist = dist_pa, epsilon = ep)
Save the result - don’t run if loading saved object
saveRDS(geodist_pa,
        file = (file.path(dataPath,"inputs/Barents_geodist_pa.rds")))

Ordination

monoMDS - don’t run if loading saved object

took 6.4mins with jonatan’s paralell solution (usually ~10mins)

# 
# Sys.time()
# d <- 2
# mds_pa <- list()
# 
# for (i in 1:100) {
#   mds_pa[[i]]<-monoMDS(geodist_pa,
#                     matrix(c(runif(dim(otu_pa)[1]*d)),
#                            nrow = dim(otu_pa)[1]),
#                     k = d,
#                     model = "global",
#                     maxit = 2000,
#                     smin = 1e-7,
#                     sfgrmin = 1e-7)
# }
# Sys.time()


## monoMDS
# d <- 2
# mds_r6 <- list()
# 
# Sys.time()
# for (i in 1:200) {
#   mds_r6[[i]]<-monoMDS(geodist_r6,
#                     matrix(c(runif(dim(otu_6)[1]*d)),
#                            nrow = dim(otu_6)[1]),
#                     k = d,
#                     model = "global",
#                     maxit = 2000,
#                     smin = 1e-7,
#                     sfgrmin = 1e-7)
# }
# Sys.time()

#Jonatan's upgrade for speed - parallel processing of mds reptitions
library(furrr) # Package to run non sequential functions in parallel
#library(purrr)
plan(multisession)

d <- 2

i <-200 # number of reps

List_geodist_pa <- lapply(seq_len(i), function(X) geodist_pa) # makes a list with the input data repeated as many times as reps wanted
start_t<-Sys.time()
Xmds_pa<-furrr::future_map(List_geodist_pa, 
                  function(x) monoMDS(x,
                                      matrix(c(runif(dim(otu_6)[1]*d)),
                                             nrow = dim(otu_6)[1]),
                                      k = d,
                                      model = "global",
                                      maxit = 2000,
                                      smin = 1e-7,
                                      sfgrmin = 1e-7),
                  .progress = TRUE)
Sys.time() - start_t
Save the result - don’t run if loading saved object

can take a few mins

saveRDS(Xmds_pa,
        file = file.path(dataPath,"inputs/Barents_mds_barents_pa.rds"))
Best nmds solution - PA

Make function?

# Loading geodist object
# geodist_nfi <- readRDS(file = "../SplitRev2_geodist_pa_full.rds")
# Loading mds results
# mds <- readRDS(file = "../SplitRev2_mds_pa_full.rds")

## Extracting the stress of each nmds iteration
mds_stress_pa<-unlist(lapply(Xmds_pa, function(v){v[[22]]})) 

ordered_pa <-order(mds_stress_pa)

## Best, second best, and worst solution
mds_stress_pa[ordered_pa[1]]
mds_stress_pa[ordered_pa[2]]
mds_stress_pa[ordered_pa[10]]

## Scaling of axes to half change units and varimax rotation by postMDS
mds_best_pa<-postMDS(Xmds_pa[[ordered_pa[1]]],
                  geodist_pa, 
                  pc = TRUE, 
                  halfchange = TRUE, 
                  threshold = ep)     # Is this threshold related to the epsilon above?
mds_best_pa

mds_secbest_pa <- postMDS(Xmds_pa[[ordered_pa[2]]],
                          geodist_pa, 
                          pc = TRUE, 
                          halfchange = TRUE, 
                          threshold = ep)
mds_secbest_pa

## Procrustes comparisons
procr_pa <- procrustes(mds_best_pa,
                    mds_secbest_pa,
                    permutations=999)
protest(mds_best_pa,
        mds_secbest_pa,
        permutations=999)

plot(procr_pa)

png(file=file.path(dataPath,"outputs/Barents_procrustes_pa.png"), width=1000, height=700)
plot(procr_pa)
dev.off()
Correlation of axis: DCA vs NMDS - PA
# Extracting ordination axis
ax <- 2
axis_pa <- cbind(mds_best_pa$points,
                 scores(dca_pa,
                        display = "sites",
                        origin = TRUE)[, 1:ax])

ggcorr(axis_pa, 
       method=c("everything","kendall"), 
       label = TRUE,
       label_size = 3, 
       label_color = "black",  
       nbreaks = 8,
       label_round = 3,
       low = "red",
       mid = "white",
       high = "green")
Save the figure
ggsave(filename = file.path(dataPath,"outputs/Barents_correlationPCAvsNMDS_PA.png"),
       device = "png",
       dpi=300 )

# Switching direction of NMDS1
# mds_best$points[, 1] <- -mds_best$points[, 1]

DCA R6

dca_r6 <- decorana(veg = otu_6)
Warning: some species were removed because they were missing in the data
print(dca_r6, head=T)

Call:
decorana(veg = otu_6) 

Detrended correspondence analysis with 26 segments.
Rescaling of axes with 4 iterations.

                  DCA1   DCA2   DCA3   DCA4
Eigenvalues     0.4478 0.3736 0.2680 0.2816
Decorana values 0.4613 0.3696 0.2924 0.2686
Axis lengths    4.2345 4.9928 4.7145 3.0913

GNMDS R6

Distances - don’t run if loading saved object

## Bray-Curtis
dist_r6 <- vegdist(x = otu_6, method = "bray")

## Geodist
ep <- 0.80     # epsilon
geodist_r6 <- isomapdist(dist = dist_r6, epsilon = ep)
Save the result - don’t run if loading saved object
saveRDS(geodist_r6,
        file = (file.path(dataPath,"inputs/Barents_below100_geodist_r6.rds")))

Ordination

200 reps - don’t run if loading saved object

Jonatan’s parallel solution took 5.4mins, before it took 10mins

## monoMDS
# d <- 2
# mds_r6 <- list()
# 
# Sys.time()
# for (i in 1:200) {
#   mds_r6[[i]]<-monoMDS(geodist_r6,
#                     matrix(c(runif(dim(otu_6)[1]*d)),
#                            nrow = dim(otu_6)[1]),
#                     k = d,
#                     model = "global",
#                     maxit = 2000,
#                     smin = 1e-7,
#                     sfgrmin = 1e-7)
# }
# Sys.time()

#Jonatan's upgrade for speed - parallel processing of mds reptitions
#library(furrr) # Package to run non sequential functions in parallel
#library(purrr)
plan(multisession)

d <- 2

i <-200 # number of reps

List_geodist_r6 <- lapply(seq_len(i), function(X) geodist_r6) # makes a list with the input data repeated as many times as reps wanted
start_t<-Sys.time()
Xmds_r6<-furrr::future_map(List_geodist_r6, 
                  function(x) monoMDS(x,
                                      matrix(c(runif(dim(otu_6)[1]*d)),
                                             nrow = dim(otu_6)[1]),
                                      k = d,
                                      model = "global",
                                      maxit = 2000,
                                      smin = 1e-7,
                                      sfgrmin = 1e-7),
                  .progress = TRUE)

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 Progress: ──────────────────────────────────────────────────────────────── 100%Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".Warning: UNRELIABLE VALUE: Future (‘<none>’) unexpectedly generated random numbers without specifying argument 'seed'. There is a risk that those random numbers are not statistically sound and the overall results might be invalid. To fix this, specify 'seed=TRUE'. This ensures that proper, parallel-safe random numbers are produced via the L'Ecuyer-CMRG method. To disable this check, use 'seed=NULL', or set option 'future.rng.onMisuse' to "ignore".
Sys.time() - start_t
Time difference of 1.793691 mins
Save the result - don’t run if loading saved object
saveRDS(Xmds_r6,
        file = file.path(dataPath,"inputs/Barents_below100_mds_r6.rds")) 
Best nmds solution r6 200 rep
# Loading geodist object
# geodist_nfi <- readRDS(file = "../SplitRev2_geodist_nfi.rds")

# Loading mds results
# mds <- readRDS(file = "../SplitRev2_mds.rds")

## Extracting the stress of each nmds iteration
mds_stress_r6<-unlist(lapply(Xmds_r6, function(v){v[[22]]})) 

ordered_r6 <-order(mds_stress_r6)

## Best, second best, and worst solution
mds_stress_r6[ordered_r6[1]]
[1] 0.2544858
mds_stress_r6[ordered_r6[2]]
[1] 0.2544858
mds_stress_r6[ordered_r6[100]]
[1] 0.2554883
## Scaling of axes to half change units and varimax rotation by postMDS
mds_best_r6<-postMDS(Xmds_r6[[ordered_r6[1]]],
                     geodist_r6, 
                     pc = TRUE, 
                     halfchange = TRUE, 
                     threshold = ep)     # Is this threshold related to the epsilon above?
mds_best_r6

Call:
monoMDS(dist = x, y = matrix(c(runif(dim(otu_6)[1] * d)), nrow = dim(otu_6)[1]),      k = d, model = "global", maxit = 2000, smin = 1e-07, sfgrmin = 1e-07) 

Non-metric Multidimensional Scaling

977 points, dissimilarity ‘bray shortest isomap’, call ‘isomapdist(dist = dist_r6, epsilon = ep)’

Dimensions: 2 
Stress:     0.2544858 
Stress type 1, weak ties
Scores scaled to unit root mean square, rotated to principal components
Stopped after 93 iterations: Scale factor of gradient nearly zero (< sfgrmin)
mds_secbest_r6<-postMDS(Xmds_r6[[ordered_r6[2]]],
                        geodist_r6, 
                        pc = TRUE, 
                        halfchange = TRUE, 
                        threshold = ep)
mds_secbest_r6

Call:
monoMDS(dist = x, y = matrix(c(runif(dim(otu_6)[1] * d)), nrow = dim(otu_6)[1]),      k = d, model = "global", maxit = 2000, smin = 1e-07, sfgrmin = 1e-07) 

Non-metric Multidimensional Scaling

977 points, dissimilarity ‘bray shortest isomap’, call ‘isomapdist(dist = dist_r6, epsilon = ep)’

Dimensions: 2 
Stress:     0.2544858 
Stress type 1, weak ties
Scores scaled to unit root mean square, rotated to principal components
Stopped after 195 iterations: Stress nearly unchanged (ratio > sratmax)
## Procrustes comparisons
procr_r6 <- procrustes(mds_best_r6,
                       mds_secbest_r6,
                       permutations=999)
protest(mds_best_r6,
        mds_secbest_r6,
        permutations=999)

Call:
protest(X = mds_best_r6, Y = mds_secbest_r6, permutations = 999) 

Procrustes Sum of Squares (m12 squared):        1.588e-05 
Correlation in a symmetric Procrustes rotation:     1 
Significance:  0.001 

Permutation: free
Number of permutations: 999
plot(procr_r6)

png(file.path(dataPath,"outputs/Barents_below100_procrustes_r6.png"), width=1000, height=700,) #added 1000
plot(procr_r6)
dev.off()
png 
  2 

#### 1000 reps - don’t run if loading saved object Currently commented out as it gained nothing but took extra time. Can be removed in due course.

Correlation of axis: DCA vs NMDS

retain the 200 rep version

# Extracting ordination axis
ax <- 2
axis_r6 <- cbind(mds_best_r6$points,
                 scores(dca_r6,
                        display = "sites",
                        origin = TRUE)[, 1:ax])

ggcorr(axis_r6, 
       method=c("everything","kendall"), 
       label = TRUE,
       label_size = 3, 
       label_color = "black",  
       nbreaks = 8,
       label_round = 3,
       low = "red",
       mid = "white",
       high = "green")

Save the figure
ggsave(filename = file.path(dataPath,"outputs/Barents_below100_correlationPCAvsNMDS_r6.png"),
       device = "png",
       dpi=300 )
Saving 7 x 7 in image
# Switching direction of NMDS1
# mds_best$points[, 1] <- -mds_best$points[, 1]

Plotting DCA & GNMDS

## Adding scores to data frame
otu_6$gnmds1 <- mds_best_r6$points[, 1]
otu_6$gnmds2 <- mds_best_r6$points[, 2]
otu_6$dca1 <- scores(dca_r6, display = "sites", origin = TRUE)[, 1]
otu_6$dca2 <- scores(dca_r6, display = "sites", origin = TRUE)[, 2]

p_gnmds_r6 <- ggplot(data = otu_6,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS",
          subtitle = "First run") +
  geom_point(colour = "red") +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")

p_dca_r6 <- ggplot(data = otu_6,
                   aes(x = dca1,
                       y = dca2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("DCA",
          subtitle = "First run") +
  geom_point(colour = "red") +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")

p_gnmds_r6 + p_dca_r6

NA
NA
Save the figure
ggsave(file.path(dataPath,"outputs/Barents_below100_gnmds_dca_r6.png"),
       device = "png", 
       dpi=300)
Saving 7 x 7 in image

Species-environment relationships

Selecting ordination

ord <- mds_best_r6

## Axis scores if selected ord is GNMDS
axis <- ord$points %>% as.data.frame

## Axis scores if selected ord is DCA
# axis <- scores(ord,
#                display = "sites",
#                origin = TRUE)[, 1:ax])

Create additional variables

decided to make MLD-bathy vars

env<-env %>% 
  mutate ("MLDmean_bathy"=MLDmean_Robinson-(bathy*-1),
          "MLDmin_bathy"=MLDmin_Robinson-(bathy*-1),
          "MLDmax_bathy"=MLDmax_Robinson-(bathy*-1))

env$MLDmean_bathy<-cut(env$MLDmean_bathy, 
      breaks=c(-2560, -20,20,130),#checked range of values first (min -2554, max 123)
      labels=c('belowMLD','onPycno','inMixLayer'))
env$MLDmin_bathy<-cut(env$MLDmin_bathy, 
      breaks=c(-2560, -20,20,130),#checked range of values first (min -2554, max 123)
      labels=c('belowMLD','onPycno','inMixLayer'))
env$MLDmax_bathy<-cut(env$MLDmax_bathy, 
      breaks=c(-2560, -20,20,130),#checked range of values first (min -2554, max 123)
      labels=c('belowMLD','onPycno','inMixLayer'))

env$swDensRob_avs<-swRho(salinity=env$Smean_Robinson,
                         temperature=env$Tmean_Robinson,
                         pressure=(env$bathy*-1),
                         eos="unesco")

Correlation ordination axes and environmental variables

Removing non-env vars

env_cont<-env%>% select(-c(landscape,sedclass,gmorph, MLDmean_bathy, MLDmax_bathy, MLDmin_bathy, #categorical
                           optional, #not a var
                           MLDmax_Robinson, MLDmean_Robinson, MLDmin_Robinson,  #replaced by new vars
                           MLDsd_Robinson #not meaningful
                           ))
env_cont<-env_cont%>% mutate_if(is.integer,as.numeric)

env_corr <- env_cont # %>% select(-c(SampID))

# env_corr$coords.x1<-as.numeric(env_corr$coords.x1)
# env_corr$coords.x2<-as.numeric(env_corr$coords.x2)

env_corr[(!is.numeric(env_corr)),]

Correlations

# Vector to hold correlations
cor_ax1 <- NULL
cor_ax2 <- NULL
pv_ax1 <- NULL
pv_ax2 <- NULL

# NMDS1
for( i in seq(length(env_corr))) {
  ct.i <- cor.test(axis$MDS1,
                   env_corr[, i],
                   method = "kendall")
  cor_ax1[i] <- ct.i$estimate
  pv_ax1[i] <- ct.i$p.value
}
Warning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zero
# NMDS2
for( i in seq(length(env_corr))) {
  ct.i <- cor.test(axis$MDS2,
                   env_corr[, i],
                   method = "kendall")
  cor_ax2[i] <- ct.i$estimate
  pv_ax2[i] <- ct.i$p.value
}
Warning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zeroWarning: the standard deviation is zero
cor_tab <- data.frame(env = names(env_corr),
                      ord_ax1 = cor_ax1,
                      pval_ax1 = pv_ax1,
                      ord_ax2 = cor_ax2,
                      pval_ax2 = pv_ax2)

cor_tab

write.csv(x = cor_tab,
          file = file.path(dataPath,"inputs/Barents_below100_cor-table_r6_200rep_MLD-bathy.csv"),
          row.names = FALSE)

Dot chart to check for gaps in correlation

cor_a1_sort<-cor_tab%>%
  mutate(abs_ord_ax1=abs(ord_ax1),
         abs_ord_ax2=abs(ord_ax2)) %>%
  arrange(desc(abs_ord_ax1))

cor_a2_sort<-cor_tab%>%
  mutate(abs_ord_ax1=abs(ord_ax1),
         abs_ord_ax2=abs(ord_ax2)) %>%
  arrange(desc(abs_ord_ax2))

dotchart(cor_a1_sort$abs_ord_ax1, main="Absolute (+/-) correlations between envVars and gnmds axis 1")


cor_cut<-0.38 #decide

cor_sel<-subset(cor_a1_sort,abs_ord_ax1>cor_cut)
cor_sel

as.data.frame(cor_sel$env)

Sel env var (top corr)

env_os <- env[, cor_sel$env]
env_os
str(env_os)
'data.frame':   977 obs. of  20 variables:
 $ BO22_dissoxltmax_bdmean: num  329 329 330 328 328 ...
 $ BO22_dissoxltmin_bdmean: num  291 291 292 290 290 ...
 $ BO22_dissoxmean_bdmean : num  310 310 311 309 309 ...
 $ BO22_dissoxrange_bdmean: num  310 310 311 309 309 ...
 $ temp_min               : num  0.293 0.289 0.188 0.356 0.339 ...
 $ BO22_icethickmean_ss   : num  1.72e-06 1.77e-06 3.98e-06 5.60e-07 6.01e-07 ...
 $ BO22_icethickltmax_ss  : num  1.68e-05 1.70e-05 2.95e-05 5.41e-06 5.57e-06 ...
 $ BO22_icecoverltmax_ss  : num  3.89e-06 3.96e-06 7.49e-06 1.56e-06 1.60e-06 ...
 $ BO22_icecovermean_ss   : num  5.55e-07 5.82e-07 1.01e-06 0.00 0.00 ...
 $ Tmin_Robinson          : num  3.77 3.76 3.56 4.1 4.09 ...
 $ temp_mean              : num  1.59 1.58 1.26 1.86 1.85 ...
 $ Y                      : num  8125334 8125534 8137534 8112534 8112934 ...
 $ coords.x2              : num  8125285 8125495 8137580 8112629 8112862 ...
 $ BO22_icecoverrange_ss  : num  3.97e-05 4.02e-05 7.06e-05 1.62e-05 1.65e-05 ...
 $ BO22_icethickrange_ss  : num  1.53e-04 1.56e-04 2.74e-04 4.96e-05 5.07e-05 ...
 $ Tmean_Robinson         : num  4.07 4.06 3.9 4.27 4.26 ...
 $ temp_max               : num  3.82 3.82 3.92 3.78 3.78 ...
 $ Leieschara_sp.         : num  0 0 0 0 0 0 0 0 0 0 ...
 $ X.y.y                  : int  485 486 488 490 491 492 493 494 495 496 ...
 $ Tmax_Robinson          : num  4.54 4.54 4.4 4.62 4.62 ...

Ordisurfs top corr

ordsrfs <- list(length = ncol(env_os))

for (i in seq(ncol(env_os))) {
  os.i <- gg_ordisurf(ord = ord,
                      env.var = env_os[, i],
                      pt.size = 1,
                      # binwidth = 0.05,
                      var.label = names(env_os)[i],
                      gen.text.size = 10,
                      title.text.size = 15,
                      leg.text.size = 10)
  
  ordsrfs[[i]] <- os.i$plot
}


ordsrfs_plt <- ggarrange(plotlist = ordsrfs,
                         nrow = 4,
                         ncol = 5)

ordsrfs_plt

Save some outputs
ggexport(ordsrfs_plt,
          filename = file.path(dataPath,"outputs/Barents_below100_ordisurfs_top_corr.png"),
          width = 2000,
          height = 2500)

Sel env var (manual)

env_os_m <- env[,c("Tmean_Robinson", #top corr
                  "salt_max", #top corr
                  "Smax_Robinson", #comparison to top corr
                  "swDensRob_avs", #top corr
                  "BO22_icecoverltmax_ss",#top corr ax2
                  "BO22_icecovermean_ss",#top corr
                  "BO22_dissoxmean_bdmean",#top corr
                  #"BO22_carbonphytoltmin_bdmean",#top corr - no clear gradient in ordisurf
                  "BO22_ppltmin_ss", #top corr
                  "X.y", #comparison to Y
                  "Y", #top corr
                  "spd_std", #top corr ax2 (blended model)
                  "CSpdsd_Robinson", #comparison to top corr ax2 (blended model)
                  "mud", #highest sed var ax1 + corr
                  "gravel",#highest sed var ax1 - corr
                  "BO22_silicateltmax_bdmean", #just under top corr ax1
                  "bathy" #intuitive for comparisons
                )]
env_os_m
str(env_os_m)
'data.frame':   1141 obs. of  16 variables:
 $ Tmean_Robinson           : num  4.07 4.07 4.06 3.9 3.9 ...
 $ salt_max                 : num  35 35 35 35 35 ...
 $ Smax_Robinson            : num  35.1 35.1 35.1 35.1 35.1 ...
 $ swDensRob_avs            : num  1029 1029 1029 1029 1029 ...
 $ BO22_icecoverltmax_ss    : num  3.86e-06 3.89e-06 3.96e-06 7.71e-06 7.49e-06 ...
 $ BO22_icecovermean_ss     : num  5.82e-07 5.55e-07 5.82e-07 1.06e-06 1.01e-06 ...
 $ BO22_dissoxmean_bdmean   : num  310 310 310 311 311 ...
 $ BO22_ppltmin_ss          : num  0 0 0 0 0 0 0 0 0 0 ...
 $ X.y                      : num  1075461 1075261 1075261 1073461 1073261 ...
 $ Y                        : num  8125134 8125334 8125534 8137734 8137534 ...
 $ spd_std                  : num  0.054 0.0541 0.0543 0.0516 0.0516 ...
 $ CSpdsd_Robinson          : num  0.0222 0.0223 0.0224 0.0163 0.0165 ...
 $ mud                      : num  69.5 60 60 69.5 69.5 69.5 60 60 60 69.5 ...
 $ gravel                   : num  0.5 15 15 0.5 0.5 0.5 15 15 15 0.5 ...
 $ BO22_silicateltmax_bdmean: num  6.55 6.55 6.55 6.58 6.58 ...
 $ bathy                    : num  -295 -292 -292 -270 -270 ...

Ordisurfs manually selected

ordsrfs_m <- list(length = ncol(env_os_m))

for (i in seq(ncol(env_os_m))) {
  os.i_m <- gg_ordisurf(ord = ord,
                      env.var = env_os_m[, i],
                      pt.size = 1,
                      # binwidth = 0.05,
                      var.label = names(env_os_m)[i],
                      gen.text.size = 10,
                      title.text.size = 15,
                      leg.text.size = 10)
  
  ordsrfs_m[[i]] <- os.i_m$plot
}


ordsrfs_plt_m <- ggarrange(plotlist = ordsrfs_m,
                         nrow = 4,
                         ncol = 4)
Warning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite numberWarning: Computation failed in `stat_contour()`:
'from' must be a finite number
ordsrfs_plt_m

Save some outputs
ggexport(ordsrfs_plt_m,
          filename = file.path(dataPath,"outputs/Barents_ordisurfs_man_sel_domean.png"),
          width = 2000,
          height = 2000)

Envfit

## Select if any var should be excluded from envfit (makes less busy to read)
env_os_m_envfit<-env_os_m [,c("Tmean_Robinson", #top corr
                  "salt_max", #top corr
                  "Smax_Robinson", #comparison to top corr
                  "swDensRob_avs", #top corr
                  "BO22_icecoverltmax_ss",#top corr ax2
                  #"BO22_icecovermean_ss",#top corr
                  "BO22_dissoxmean_bdmean",#top corr
                  #"BO22_dissoxltmin_bdmean",#top corr
                  #"BO22_carbonphytoltmin_bdmean",#top corr - no clear gradient in ordisurf
                  "BO22_ppltmin_ss", #top corr
                  "X.y", #comparison to Y
                  "Y", #top corr
                  "spd_std", #top corr ax2 (blended model)
                 # "CSpdsd_Robinson", #comparison to top corr ax2 (blended model)
                  "mud", #highest sed var ax1 + corr
                  "gravel",#highest sed var ax1 - corr
                  "BO22_silicateltmax_bdmean", #just under top corr ax1
                  "bathy" #intuitive for comparisons
                
  
)]

colnames(env_os_m_envfit)<-c("T", #top corr
                  "sMx", #top corr
                  "SmaxR", #comparison to top corr
                  "swDensR", #top corr
                  "icecovmax",#top corr ax2
                  #"icecovav",#top corr
                  "dissoxav",#top corr
                  #"dissoxmin",#top corr
                  #"BO22_carbonphytoltmin_bdmean",#top corr - no clear gradient in ordisurf
                  "ppltmin", #top corr
                  "X", #comparison to Y
                  "Y", #top corr
                  "spd_std", #top corr ax2 (blended model)
                 # "CSsd", #comparison to top corr ax2 (blended model)
                  "mud", #highest sed var ax1 + corr
                  "gravel",#highest sed var ax1 - corr
                  "SiLtmax", #just under top corr ax1
                  "bathy" #intuitive for comparisons
                 )

## Envfot plot
gg_envfit(ord = ord,
          env = env_os_m_envfit,
          pt.size = 1)
Error in envfit.default(ord, env, choices = choices, perm = perm) : 
  missing values in data: consider na.rm = TRUE
Save the plot
ggsave(filename = file.path(dataPath,"outputs/Barents_EnvFit_man_sel_cln_domean.png"),
       device = "png",
       dpi=300 )
Saving 7 x 7 in image

Categorical envVar visualised on the mdsplots

use dataset with categorical var included

SampID <- env_sort$SampID

env_vis<-env
env_vis$gnmds1 <- otu_6$gnmds1
env_vis$gnmds2 <- otu_6$gnmds2

env_vis$dca1 <- otu_6$dca1
env_vis$dca2 <- otu_6$dca2

gnmds w mld mean - bathy

dca_int <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("Interactive DCA sample ID plot",
          subtitle = "First run") +
  geom_point(aes(colour = factor(SampID))) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")

ggplotly(dca_int)
Error in `check_aesthetics()`:
! Aesthetics must be either length 1 or the same as the data (1137): colour
Backtrace:
 1. plotly::ggplotly(dca_int)
 2. plotly:::ggplotly.ggplot(dca_int)
 3. plotly::gg2list(...)
 4. plotly (local) ggplotly_build(p)
 5. plotly (local) by_layer(function(l, d) l$compute_aesthetics(d, plot))
 6. plotly (local) f(l = layers[[i]], d = data[[i]])
 7. l$compute_aesthetics(d, plot)
 8. ggplot2 (local) f(..., self = self)
 9. ggplot2:::check_aesthetics(evaled, n)

gnmds w mld mean - bathy

p_mld <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by proximity to mixed layer depth",
          subtitle = "First run") +
  geom_point(aes(colour = MLDmean_bathy)) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")

p_mld

gnmds w sedclass

deal with sedclass codes
env_vis<- env_vis %>% 
  mutate(
    sedclassName = case_when(
            sedclass == "1" ~ "SedCoverR",
            sedclass == "5" ~ "Rock",
            sedclass == "20" ~ "Mud",
            sedclass == "21" ~ "MwBlock",
            sedclass == "40" ~ "sMud",
            sedclass == "80" ~ "mSand",
            sedclass == "100" ~ "Sand",
            sedclass == "110" ~ "gMud",
            sedclass == "115" ~ "gsMud",
            sedclass == "120" ~ "gmSand",
            sedclass == "130" ~ "gSand",
            sedclass == "150" ~ "MSG",
            sedclass == "160" ~ "sGravel",
            sedclass == "170" ~ "Gravel",
            sedclass == "175" ~ "GravBlock",
            sedclass == "185" ~ "SGBmix",
            sedclass == "205" ~ "S/MwB",
            sedclass == "206" ~ "S/MwG/B",
            sedclass == "215" ~ "SGBalt",
            sedclass == "300" ~ "HardSed",
            sedclass == "500" ~ "Biogenic"
                        
    )
  )
colour palette to cope with up to 25 categorical colours
c25 <- c(
  "dodgerblue2", "#E31A1C", # red
  "green4",
  "#6A3D9A", # purple
  "#FF7F00", # orange
  "black", "gold1",
  "skyblue2", "#FB9A99", # lt pink
  "palegreen2",
  "#CAB2D6", # lt purple
  "#FDBF6F", # lt orange
  "gray70", "khaki2",
  "maroon", "orchid1", "deeppink1", "blue1", "steelblue4",
  "darkturquoise", "green1", "yellow4", "yellow3",
  "darkorange4", "brown"
)

p_sed <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by sediment class",
          subtitle = "First run") +
  geom_point(aes(colour = factor(sedclassName))) +
   scale_colour_manual(values=c25)+
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")+
  guides(colour=guide_legend(ncol=2))

p_sed

gnmds w lanscape

deal with sedclass codes
env_vis<- env_vis %>% 
  mutate(
    landscapeName = case_when(
            landscape == "1" ~ "Strandflat",
            landscape == "21" ~ "ContSlope",
            landscape == "22" ~ "Canyon",
            landscape == "31" ~ "Valley",
            landscape == "32" ~ "Fjord",
            landscape == "41" ~ "DeepPlain",
            landscape == "42" ~ "SlopePlain",
            landscape == "43" ~ "ShelfPlain",
            landscape == "431" ~ "shallowValley"
    )
  )

p_land <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by landscape class",
          subtitle = "First run") +
  geom_point(aes(colour = factor(landscapeName))) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")+
  guides(colour=guide_legend(ncol=2))

p_land

Gnmds w gmorph


p_gmo <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by landscape class",
          subtitle = "First run") +
  geom_point(aes(colour = factor(gmorph))) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")+
  guides(colour=guide_legend(ncol=2))

p_gmo

cat_var_plots<-p_mld+p_sed+p_land+p_gmo
Save the plot
ggexport(cat_var_plots,
          filename = file.path(dataPath,"outputs/Barents_gnmds_catvar.png"),
          width = 1000,
          height = 800)

Sample identification in the mdsplot

p_gmo <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by sample",
          subtitle = "First run") +
  geom_point(aes(colour = factor(SampID))) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")+
  guides(colour="none", size="none")

ggplotly(p_gmo)
Error in `check_aesthetics()`:
! Aesthetics must be either length 1 or the same as the data (1137): colour
Backtrace:
 1. plotly::ggplotly(p_gmo)
 2. plotly:::ggplotly.ggplot(p_gmo)
 3. plotly::gg2list(...)
 4. plotly (local) ggplotly_build(p)
 5. plotly (local) by_layer(function(l, d) l$compute_aesthetics(d, plot))
 6. plotly (local) f(l = layers[[i]], d = data[[i]])
 7. l$compute_aesthetics(d, plot)
 8. ggplot2 (local) f(..., self = self)
 9. ggplot2:::check_aesthetics(evaled, n)
---
title: "MAREANO - NiN - loDens <1031.8 without SpitsbergenBanken outliers"
authors: Thijs van Son, Rune Halvorsen, Rebecca Ross, Genoveva Gonzales-Mirelis, Margaret Dolan
date: "Last Rendered on `r format(Sys.time(), '%d %B, %Y')`"
output: 
  html_notebook: 
    toc: yes
    toc_depth: 2
    toc_float: yes
    fig_width: 7
    fig_height: 7
always_allow_html: true 
---

## Packages
```{r}

library(dplyr)
library(ggcorrplot)
library(ggpubr)
library(patchwork)
# library("here")
# library("bookdown")
# library("downloadthis")
library(vegan)
library(plyr)
library(e1071)
library(tidyverse)
library(viridis)
library(GGally)
library(ggrepel)
library(readr)
library(RColorBrewer)
library(oce) 
library(plotly)
library(purrr)
library(furrr)

#install_github("jfq3/ggordiplots")
library(ggordiplots)


source("gg_ordisurf_viridis.R")
```

LOAD OBJECTS IF HAVE RUN ALREADY
```{r}
geodist_pa<-readRDS(file.path(dataPath,"inputs/Barents_geodist_pa.rds"))
geodist_r6<-readRDS(file.path(dataPath,"inputs/Barents_geodist_r6.rds"))

mds_pa<-readRDS(file.path(dataPath,"inputs/Barents_mds_pa.rds"))
mds_r6<-readRDS(file.path(dataPath,"inputs/Barents_mds_r6.rds"))
#mds_r6_1000<-readRDS(file.path(dataPath,"inputs/Barents_mds_r6_1000rep.rds"))

ep<-0.8 #epsilon (to avoid having to find and run just this line from code blocks where the mds objects were made)
```


## Data
```{r}

env_sort <- read.csv(file.path(dataPath,"inputs/SPLITS/BARENTS/LDnoSBhi02_env_sort_2022-09-29.csv")) %>% as.data.frame
otu_sort <- read.csv(file.path(dataPath,"inputs/SPLITS/BARENTS/LDnoSBhi02_otu_sort_2022-09-29.csv")) %>% as.data.frame


#must be same length and equal to unique sample number length - the ordered lists are assumed to be directly relatable on a row by row basis

joinedDat<- left_join(env_sort,otu_sort, by=c("SampID"="SampID"))
joinedDat1<-subset(joinedDat, bathy <= -99)
summary(joinedDat1$bathy)

env_sort<-joinedDat1 %>% select(c(2:351))
otu_sort<-joinedDat1 %>% select(c(2,352:491))

#table(env_sort$SampID2 == otu_sort$SampID)
dim(env_sort)
dim(otu_sort)
```

#### remove any variables with not enough coverage
```{r}

env_sort <- env_sort %>% select(-c("BO22_lightbotmean_bdmean",
                               "BO22_lightbotltmax_bdmean",
                               "BO22_lightbotltmin_bdmean",
                               "BO22_lightbotrange_bdmean"))
```


#### Plot map to check location of samples
```{r}
env_sort_locations<- ggplot(data = env_sort,
                      aes(x = X.y,
                          y = Y)) +
  theme_classic() +
  geom_point(aes(colour = bathy),
             size = 2) +
  scale_colour_gradient2(low = "red",
                         mid = "yellow",
                         high = "green") +
  ggtitle("Location of samples in sorted env file")

env_sort_locations
```


### Data cleaning
```{r}
## Removing NAs
otuCompl <- otu_sort[complete.cases(env_sort[, -c(1:which(colnames(env_sort)=="bathy")-1)]), ] # make sure we have the columms 
envCompl <- env_sort[complete.cases(env_sort[, -c(1:which(colnames(env_sort)=="bathy")-1)]), ]

## Removing observations with less than 4 OTUs
sel <- rowSums(otuCompl[, -c(1:2)]) >= 4
otuSel <- otuCompl[sel, ]
envSel <- envCompl[sel, ]


## Removing phosphate
#envSel <- envSel %>% select(-phosphate_mean.tif)


dim(otuSel); dim(envSel)
```
#### Show what samples are left after complete cases and >4 OTUs filters
```{r}
env_sel_locations<- ggplot(data = envSel,
                      aes(x = X.y,
                          y = Y)) +
  theme_classic() +
  geom_point(aes(colour = bathy),
             size = 2) +
  scale_colour_gradient2(low = "red",
                         mid = "yellow",
                         high = "green") +
  ggtitle("Location of samples in sorted env file")

env_sel_locations
```

#### Show what got removed in complete cases filter
```{r}
envCompl_ccrem<-env_sort%>%filter(!SampID%in%envCompl$SampID)

envCompl_ccrem_locations<- ggplot(data = envCompl_ccrem,
                      aes(x = X.y,
                          y = Y)) +
  theme_classic() +
  geom_point(aes(colour = bathy),
             size = 2) +
  scale_colour_gradient2(low = "red",
                         mid = "yellow",
                         high = "green") +
  ggtitle("Location of removed complete case samples resulting in envSel file")

envCompl_ccrem_locations
```
#### Show what got removed in <4 OTUs filter


```{r}
inv.sel <- rowSums(otuCompl[, -c(1:2)]) < 4
env.invSel <- envCompl[inv.sel, ]

env.invSel_locations<- ggplot(data = env.invSel,
                      aes(x = X.y,
                          y = Y)) +
  theme_classic() +
  geom_point(aes(colour = bathy),
             size = 2) +
  scale_colour_gradient2(low = "red",
                         mid = "yellow",
                         high = "green") +
  ggtitle("Location of removed samples with <4 OTUs resulting in envSel file")

env.invSel_locations

```

### [Optional] Data thinning
```{r, eval=FALSE}
# otu_red <- otu1[1:500, ]
# otu <- otu_red
# 
# env_red <- env[1:500, ]
# env <- env_red
```

### Whole dataset for first run
```{r}

otu<-otuSel[,-c(1: which(colnames(otuSel)=="Lithodidae")-1)]
env<-envSel[,-c(1: which(colnames(env_sort)=="bathy")-1)]

table(is.na(otu))

table(is.na(env))

#str(otuSel)
#str(envSel)
```


### Splitting in subsets
```{r}
# ## Class 1
# otu1 <- subset(otuSel, envSel$SplitRev == 1)
# env1 <- envSel %>% filter(SplitRev == 1)
# 
# ## Class 2
# otu2 <- subset(otuSel, envSel$SplitRev == 2)
# env2 <- envSel %>% filter(SplitRev == 2)
# 
# ## Class 4
# otu3 <- subset(otuSel, envSel$SplitRev == 3)
# env3 <- envSel %>% filter(SplitRev == 3)
# 
# ## Class 4
# otu4 <- subset(otuSel, envSel$SplitRev == 4)
# env4 <- envSel %>% filter(SplitRev == 4)
# 
# ## Class 6
# otu6 <- subset(otuSel, envSel$SplitRev == 6)
# env6 <- envSel %>% filter(SplitRev == 6)
# 
# ## Class 7
# otu7 <- subset(otuSel, envSel$SplitRev == 7)
# env7 <- envSel %>% filter(SplitRev == 7)
# 
# ## Class 8
# otu8 <- subset(otuSel, envSel$SplitRev == 8)
# env8 <- envSel %>% filter(SplitRev == 8)
```

## Selecting subset
```{r}
# ## Selecting 
# otu <- otu2
# env <- env2

```

## format data correctly
```{r}
#env$coords.x1<-as.numeric(env$coords.x1)
#env$coords.x2<-as.numeric(env$coords.x2)


```


## Abundance weighting
Make function
You might have to drop variables that have been imported as character
```{r}

otu_pa <- decostand(x = otu[, -c(1)],
                    method = "pa")

# y = ax^w         # power transformation formula
dt <- otu[, -c(1:2)]          # species data to transform
x_mn <- min(dt[dt > 0])
x_mx <- max(dt)
rng <- 6           # abundance range
w <- log(rng) / (log(x_mx) - log(x_mn))
a <- x_mn^(-w)
# otu_6 <- a * dt[, -c(1:3)]^w
otu_6 <- a * dt^w
range(otu_6)
```

## Ordination methods
### DCA PA
```{r}
Sys.time()
dca_pa <- decorana(veg = otu_pa)

print(dca_pa, head=T)
```


### GNMDS PA

#### Distances - don't run if loading saved object

```{r}
## Bray-Curtis
dist_pa <- vegdist(x = otu_pa, method = "bray")

## Geodist
ep <- 0.8     # epsilon
geodist_pa <- isomapdist(dist = dist_pa, epsilon = ep)
```


##### Save the result - don't run if loading saved object
```{r}
saveRDS(geodist_pa,
        file = (file.path(dataPath,"inputs/Barents_geodist_pa.rds")))
```

#### Ordination

#### monoMDS - don't run if loading saved object
took 6.4mins with jonatan's paralell solution (usually ~10mins)
```{r}
# 
# Sys.time()
# d <- 2
# mds_pa <- list()
# 
# for (i in 1:100) {
#   mds_pa[[i]]<-monoMDS(geodist_pa,
#                     matrix(c(runif(dim(otu_pa)[1]*d)),
#                            nrow = dim(otu_pa)[1]),
#                     k = d,
#                     model = "global",
#                     maxit = 2000,
#                     smin = 1e-7,
#                     sfgrmin = 1e-7)
# }
# Sys.time()


## monoMDS
# d <- 2
# mds_r6 <- list()
# 
# Sys.time()
# for (i in 1:200) {
#   mds_r6[[i]]<-monoMDS(geodist_r6,
#                     matrix(c(runif(dim(otu_6)[1]*d)),
#                            nrow = dim(otu_6)[1]),
#                     k = d,
#                     model = "global",
#                     maxit = 2000,
#                     smin = 1e-7,
#                     sfgrmin = 1e-7)
# }
# Sys.time()

#Jonatan's upgrade for speed - parallel processing of mds reptitions
library(furrr) # Package to run non sequential functions in parallel
#library(purrr)
plan(multisession)

d <- 2

i <-200 # number of reps

List_geodist_pa <- lapply(seq_len(i), function(X) geodist_pa) # makes a list with the input data repeated as many times as reps wanted
start_t<-Sys.time()
Xmds_pa<-furrr::future_map(List_geodist_pa, 
                  function(x) monoMDS(x,
                                      matrix(c(runif(dim(otu_6)[1]*d)),
                                             nrow = dim(otu_6)[1]),
                                      k = d,
                                      model = "global",
                                      maxit = 2000,
                                      smin = 1e-7,
                                      sfgrmin = 1e-7),
                  .progress = TRUE)
Sys.time() - start_t



```

##### Save the result - don't run if loading saved object
can take a few mins
```{r}
saveRDS(Xmds_pa,
        file = file.path(dataPath,"inputs/Barents_mds_barents_pa.rds"))
```


##### Best nmds solution - PA
Make function?
```{r, eval=TRUE}
# Loading geodist object
# geodist_nfi <- readRDS(file = "../SplitRev2_geodist_pa_full.rds")
```


```{r}
# Loading mds results
# mds <- readRDS(file = "../SplitRev2_mds_pa_full.rds")

## Extracting the stress of each nmds iteration
mds_stress_pa<-unlist(lapply(Xmds_pa, function(v){v[[22]]})) 

ordered_pa <-order(mds_stress_pa)

## Best, second best, and worst solution
mds_stress_pa[ordered_pa[1]]
mds_stress_pa[ordered_pa[2]]
mds_stress_pa[ordered_pa[10]]

## Scaling of axes to half change units and varimax rotation by postMDS
mds_best_pa<-postMDS(Xmds_pa[[ordered_pa[1]]],
                  geodist_pa, 
                  pc = TRUE, 
                  halfchange = TRUE, 
                  threshold = ep)     # Is this threshold related to the epsilon above?
mds_best_pa

mds_secbest_pa <- postMDS(Xmds_pa[[ordered_pa[2]]],
                          geodist_pa, 
                          pc = TRUE, 
                          halfchange = TRUE, 
                          threshold = ep)
mds_secbest_pa

## Procrustes comparisons
procr_pa <- procrustes(mds_best_pa,
                    mds_secbest_pa,
                    permutations=999)
protest(mds_best_pa,
        mds_secbest_pa,
        permutations=999)

plot(procr_pa)

png(file=file.path(dataPath,"outputs/Barents_procrustes_pa.png"), width=1000, height=700)
plot(procr_pa)
dev.off()
```

##### Correlation of axis: DCA vs NMDS - PA
```{r}
# Extracting ordination axis
ax <- 2
axis_pa <- cbind(mds_best_pa$points,
                 scores(dca_pa,
                        display = "sites",
                        origin = TRUE)[, 1:ax])

ggcorr(axis_pa, 
       method=c("everything","kendall"), 
       label = TRUE,
       label_size = 3, 
       label_color = "black",  
       nbreaks = 8,
       label_round = 3,
       low = "red",
       mid = "white",
       high = "green")


```

##### Save the figure
```{r}
ggsave(filename = file.path(dataPath,"outputs/Barents_correlationPCAvsNMDS_PA.png"),
       device = "png",
       dpi=300 )

# Switching direction of NMDS1
# mds_best$points[, 1] <- -mds_best$points[, 1]
```

### DCA R6
```{r}
dca_r6 <- decorana(veg = otu_6)

print(dca_r6, head=T)
```


### GNMDS R6
#### Distances - don't run if loading saved object
```{r}
## Bray-Curtis
dist_r6 <- vegdist(x = otu_6, method = "bray")

## Geodist
ep <- 0.80     # epsilon
geodist_r6 <- isomapdist(dist = dist_r6, epsilon = ep)
```

##### Save the result - don't run if loading saved object
```{r}
saveRDS(geodist_r6,
        file = (file.path(dataPath,"inputs/Barents_below100_geodist_r6.rds")))
```


#### Ordination 

##### 200 reps - don't run if loading saved object
Jonatan's parallel solution took 5.4mins, before it took 10mins


```{r}
## monoMDS
# d <- 2
# mds_r6 <- list()
# 
# Sys.time()
# for (i in 1:200) {
#   mds_r6[[i]]<-monoMDS(geodist_r6,
#                     matrix(c(runif(dim(otu_6)[1]*d)),
#                            nrow = dim(otu_6)[1]),
#                     k = d,
#                     model = "global",
#                     maxit = 2000,
#                     smin = 1e-7,
#                     sfgrmin = 1e-7)
# }
# Sys.time()

#Jonatan's upgrade for speed - parallel processing of mds reptitions
#library(furrr) # Package to run non sequential functions in parallel
#library(purrr)
plan(multisession)

d <- 2

i <-200 # number of reps

List_geodist_r6 <- lapply(seq_len(i), function(X) geodist_r6) # makes a list with the input data repeated as many times as reps wanted
start_t<-Sys.time()
Xmds_r6<-furrr::future_map(List_geodist_r6, 
                  function(x) monoMDS(x,
                                      matrix(c(runif(dim(otu_6)[1]*d)),
                                             nrow = dim(otu_6)[1]),
                                      k = d,
                                      model = "global",
                                      maxit = 2000,
                                      smin = 1e-7,
                                      sfgrmin = 1e-7),
                  .progress = TRUE)
Sys.time() - start_t

```

##### Save the result - don't run if loading saved object
```{r}
saveRDS(Xmds_r6,
        file = file.path(dataPath,"inputs/Barents_below100_mds_r6.rds")) 
```

##### Best nmds solution r6 200 rep 
```{r, eval=TRUE}
# Loading geodist object
# geodist_nfi <- readRDS(file = "../SplitRev2_geodist_nfi.rds")

# Loading mds results
# mds <- readRDS(file = "../SplitRev2_mds.rds")

## Extracting the stress of each nmds iteration
mds_stress_r6<-unlist(lapply(Xmds_r6, function(v){v[[22]]})) 

ordered_r6 <-order(mds_stress_r6)

## Best, second best, and worst solution
mds_stress_r6[ordered_r6[1]]
mds_stress_r6[ordered_r6[2]]
mds_stress_r6[ordered_r6[100]]

## Scaling of axes to half change units and varimax rotation by postMDS
mds_best_r6<-postMDS(Xmds_r6[[ordered_r6[1]]],
                     geodist_r6, 
                     pc = TRUE, 
                     halfchange = TRUE, 
                     threshold = ep)     # Is this threshold related to the epsilon above?
mds_best_r6

mds_secbest_r6<-postMDS(Xmds_r6[[ordered_r6[2]]],
                        geodist_r6, 
                        pc = TRUE, 
                        halfchange = TRUE, 
                        threshold = ep)
mds_secbest_r6

## Procrustes comparisons
procr_r6 <- procrustes(mds_best_r6,
                       mds_secbest_r6,
                       permutations=999)
protest(mds_best_r6,
        mds_secbest_r6,
        permutations=999)

plot(procr_r6)

png(file.path(dataPath,"outputs/Barents_below100_procrustes_r6.png"), width=1000, height=700,) #added 1000
plot(procr_r6)
dev.off()
```

 #### 1000 reps - don't run if loading saved object 
 Currently commented out as it gained nothing but took extra time. Can be removed in due course.
<!-- took 1hr -->
<!-- ```{r} -->
<!-- # monoMDS -->
<!-- d <- 2 -->
<!-- mds_r6_1000 <- list()#obj added_1000 -->

<!-- Sys.time() -->
<!-- for (i in 1:1000) {#change from 200 (200 ra in 20min, 1000 ran in 1hr) -->
<!--   mds_r6_1000[[i]]<-monoMDS(geodist_r6,#obj added _1000 -->
<!--                     matrix(c(runif(dim(otu_6)[1]*d)), -->
<!--                            nrow = dim(otu_6)[1]), -->
<!--                     k = d, -->
<!--                     model = "global", -->
<!--                     maxit = 2000, -->
<!--                     smin = 1e-7, -->
<!--                     sfgrmin = 1e-7) -->
<!-- } -->
<!-- Sys.time() -->
<!-- ``` -->

<!-- ##### Save the result - don't run if loading saved object -->
<!-- ```{r} -->
<!-- saveRDS(mds_r6_1000, #obj added_1000 -->
<!--         file = file.path(dataPath,"inputs/mds_r6_1000rep.rds")) #change from 200 -->
<!-- ``` -->

<!-- ##### Best nmds solution r6 1000 rep -->
<!-- ```{r, eval=TRUE} -->
<!-- # Loading geodist object -->
<!-- # geodist_nfi <- readRDS(file = "../SplitRev2_geodist_nfi.rds") -->

<!-- # Loading mds results -->
<!-- # mds <- readRDS(file = "../SplitRev2_mds.rds") -->

<!-- ## Extracting the stress of each nmds iteration -->
<!-- mds_stress_r6_1000<-unlist(lapply(mds_r6_1000, function(v){v[[22]]})) #adeed 1000 -->

<!-- ordered_r6_1000 <-order(mds_stress_r6_1000) -->

<!-- ## Best, second best, and worst solution -->
<!-- mds_stress_r6_1000[ordered_r6_1000[1]] -->
<!-- mds_stress_r6_1000[ordered_r6_1000[2]] -->
<!-- mds_stress_r6_1000[ordered_r6_1000[100]] -->

<!-- ## Scaling of axes to half change units and varimax rotation by postMDS -->
<!-- mds_best_r6_1000<-postMDS(mds_r6_1000[[ordered_r6_1000[1]]], -->
<!--                      geodist_r6,  -->
<!--                      pc = TRUE,  -->
<!--                      halfchange = TRUE,  -->
<!--                      threshold = ep)     # Is this threshold related to the epsilon above? -->
<!-- mds_best_r6_1000 -->

<!-- mds_secbest_r6_1000<-postMDS(mds_r6_1000[[ordered_r6_1000[2]]], -->
<!--                         geodist_r6,  -->
<!--                         pc = TRUE,  -->
<!--                         halfchange = TRUE,  -->
<!--                         threshold = ep) -->
<!-- mds_secbest_r6_1000 -->

<!-- ## Procrustes comparisons -->
<!-- procr_r6_1000 <- procrustes(mds_best_r6_1000, -->
<!--                        mds_secbest_r6_1000, -->
<!--                        permutations=999) -->
<!-- protest(mds_best_r6_1000, -->
<!--         mds_secbest_r6_1000, -->
<!--         permutations=999) -->

<!-- plot(procr_r6_1000) -->

<!-- png(file.path(dataPath,"outputs/procrustes_r6_1000.png"), width=1000, height=700,) #added 1000 -->
<!-- plot(procr_r6_1000) -->
<!-- dev.off() -->
<!-- ``` -->



##### Correlation of axis: DCA vs NMDS 
retain the 200 rep version
```{r}
# Extracting ordination axis
ax <- 2
axis_r6 <- cbind(mds_best_r6$points,
                 scores(dca_r6,
                        display = "sites",
                        origin = TRUE)[, 1:ax])

ggcorr(axis_r6, 
       method=c("everything","kendall"), 
       label = TRUE,
       label_size = 3, 
       label_color = "black",  
       nbreaks = 8,
       label_round = 3,
       low = "red",
       mid = "white",
       high = "green")

```

##### Save the figure
```{r}
ggsave(filename = file.path(dataPath,"outputs/Barents_below100_correlationPCAvsNMDS_r6.png"),
       device = "png",
       dpi=300 )

# Switching direction of NMDS1
# mds_best$points[, 1] <- -mds_best$points[, 1]
```

### Plotting DCA & GNMDS
```{r}
## Adding scores to data frame
otu_6$gnmds1 <- mds_best_r6$points[, 1]
otu_6$gnmds2 <- mds_best_r6$points[, 2]
otu_6$dca1 <- scores(dca_r6, display = "sites", origin = TRUE)[, 1]
otu_6$dca2 <- scores(dca_r6, display = "sites", origin = TRUE)[, 2]

p_gnmds_r6 <- ggplot(data = otu_6,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS",
          subtitle = "First run") +
  geom_point(colour = "red") +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")

p_dca_r6 <- ggplot(data = otu_6,
                   aes(x = dca1,
                       y = dca2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("DCA",
          subtitle = "First run") +
  geom_point(colour = "red") +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")

p_gnmds_r6 + p_dca_r6


```

##### Save the figure
```{r}
ggsave(file.path(dataPath,"outputs/Barents_below100_gnmds_dca_r6.png"),
       device = "png", 
       dpi=300)
```


## Species-environment relationships
### Selecting ordination
```{r}
ord <- mds_best_r6

## Axis scores if selected ord is GNMDS
axis <- ord$points %>% as.data.frame

## Axis scores if selected ord is DCA
# axis <- scores(ord,
#                display = "sites",
#                origin = TRUE)[, 1:ax])

```

### Create additional variables
decided to make MLD-bathy vars
```{r}
env<-env %>% 
  mutate ("MLDmean_bathy"=MLDmean_Robinson-(bathy*-1),
          "MLDmin_bathy"=MLDmin_Robinson-(bathy*-1),
          "MLDmax_bathy"=MLDmax_Robinson-(bathy*-1))

env$MLDmean_bathy<-cut(env$MLDmean_bathy, 
      breaks=c(-2560, -20,20,130),#checked range of values first (min -2554, max 123)
      labels=c('belowMLD','onPycno','inMixLayer'))
env$MLDmin_bathy<-cut(env$MLDmin_bathy, 
      breaks=c(-2560, -20,20,130),#checked range of values first (min -2554, max 123)
      labels=c('belowMLD','onPycno','inMixLayer'))
env$MLDmax_bathy<-cut(env$MLDmax_bathy, 
      breaks=c(-2560, -20,20,130),#checked range of values first (min -2554, max 123)
      labels=c('belowMLD','onPycno','inMixLayer'))

env$swDensRob_avs<-swRho(salinity=env$Smean_Robinson,
                         temperature=env$Tmean_Robinson,
                         pressure=(env$bathy*-1),
                         eos="unesco")

```



### Correlation ordination axes and environmental variables
#### Removing non-env vars
```{r}
env_cont<-env%>% select(-c(landscape,sedclass,gmorph, MLDmean_bathy, MLDmax_bathy, MLDmin_bathy, #categorical
                           optional, #not a var
                           MLDmax_Robinson, MLDmean_Robinson, MLDmin_Robinson,  #replaced by new vars
                           MLDsd_Robinson #not meaningful
                           ))
env_cont<-env_cont%>% mutate_if(is.integer,as.numeric)

env_corr <- env_cont # %>% select(-c(SampID))

# env_corr$coords.x1<-as.numeric(env_corr$coords.x1)
# env_corr$coords.x2<-as.numeric(env_corr$coords.x2)

env_corr[(!is.numeric(env_corr)),]
```

#### Correlations
```{r}
# Vector to hold correlations
cor_ax1 <- NULL
cor_ax2 <- NULL
pv_ax1 <- NULL
pv_ax2 <- NULL

# NMDS1
for( i in seq(length(env_corr))) {
  ct.i <- cor.test(axis$MDS1,
                   env_corr[, i],
                   method = "kendall")
  cor_ax1[i] <- ct.i$estimate
  pv_ax1[i] <- ct.i$p.value
}

# NMDS2
for( i in seq(length(env_corr))) {
  ct.i <- cor.test(axis$MDS2,
                   env_corr[, i],
                   method = "kendall")
  cor_ax2[i] <- ct.i$estimate
  pv_ax2[i] <- ct.i$p.value
}

cor_tab <- data.frame(env = names(env_corr),
                      ord_ax1 = cor_ax1,
                      pval_ax1 = pv_ax1,
                      ord_ax2 = cor_ax2,
                      pval_ax2 = pv_ax2)

cor_tab

write.csv(x = cor_tab,
          file = file.path(dataPath,"inputs/Barents_below100_cor-table_r6_200rep_MLD-bathy.csv"),
          row.names = FALSE)
```
### Dot chart to check for gaps in correlation

```{r}
cor_a1_sort<-cor_tab%>%
  mutate(abs_ord_ax1=abs(ord_ax1),
         abs_ord_ax2=abs(ord_ax2)) %>%
  arrange(desc(abs_ord_ax1))

cor_a2_sort<-cor_tab%>%
  mutate(abs_ord_ax1=abs(ord_ax1),
         abs_ord_ax2=abs(ord_ax2)) %>%
  arrange(desc(abs_ord_ax2))

dotchart(cor_a1_sort$abs_ord_ax1, main="Absolute (+/-) correlations between envVars and gnmds axis 1")

cor_cut<-0.38 #decide

cor_sel<-subset(cor_a1_sort,abs_ord_ax1>cor_cut)
cor_sel

as.data.frame(cor_sel$env)
```


### Sel env var (top corr)
```{r}
env_os <- env[, cor_sel$env]
env_os
str(env_os)


```


### Ordisurfs top corr
```{r}
ordsrfs <- list(length = ncol(env_os))

for (i in seq(ncol(env_os))) {
  os.i <- gg_ordisurf(ord = ord,
                      env.var = env_os[, i],
                      pt.size = 1,
                      # binwidth = 0.05,
                      var.label = names(env_os)[i],
                      gen.text.size = 10,
                      title.text.size = 15,
                      leg.text.size = 10)
  
  ordsrfs[[i]] <- os.i$plot
}

ordsrfs_plt <- ggarrange(plotlist = ordsrfs,
                         nrow = 4,
                         ncol = 5)

ordsrfs_plt
```
##### Save some outputs
```{r}
ggexport(ordsrfs_plt,
          filename = file.path(dataPath,"outputs/Barents_below100_ordisurfs_top_corr.png"),
          width = 2000,
          height = 2500)

```


### Sel env var (manual)
```{r}
env_os_m <- env[,c("Tmean_Robinson", #top corr
                  "salt_max", #top corr
                  "Smax_Robinson", #comparison to top corr
                  "swDensRob_avs", #top corr
                  "BO22_icecoverltmax_ss",#top corr ax2
                  "BO22_icecovermean_ss",#top corr
                  "BO22_dissoxmean_bdmean",#top corr
                  #"BO22_carbonphytoltmin_bdmean",#top corr - no clear gradient in ordisurf
                  "BO22_ppltmin_ss", #top corr
                  "X.y", #comparison to Y
                  "Y", #top corr
                  "spd_std", #top corr ax2 (blended model)
                  "CSpdsd_Robinson", #comparison to top corr ax2 (blended model)
                  "mud", #highest sed var ax1 + corr
                  "gravel",#highest sed var ax1 - corr
                  "BO22_silicateltmax_bdmean", #just under top corr ax1
                  "bathy" #intuitive for comparisons
                )]
env_os_m
str(env_os_m)

```


### Ordisurfs manually selected
```{r}
ordsrfs_m <- list(length = ncol(env_os_m))

for (i in seq(ncol(env_os_m))) {
  os.i_m <- gg_ordisurf(ord = ord,
                      env.var = env_os_m[, i],
                      pt.size = 1,
                      # binwidth = 0.05,
                      var.label = names(env_os_m)[i],
                      gen.text.size = 10,
                      title.text.size = 15,
                      leg.text.size = 10)
  
  ordsrfs_m[[i]] <- os.i_m$plot
}

ordsrfs_plt_m <- ggarrange(plotlist = ordsrfs_m,
                         nrow = 4,
                         ncol = 4)

ordsrfs_plt_m
```

##### Save some outputs
```{r}
ggexport(ordsrfs_plt_m,
          filename = file.path(dataPath,"outputs/Barents_below100_ordisurfs_man_sel_domean.png"),
          width = 2000,
          height = 2000)

```




### Envfit
```{r}
## Select if any var should be excluded from envfit (makes less busy to read)
env_os_m_envfit<-env_os_m [,c("Tmean_Robinson", #top corr
                  "salt_max", #top corr
                  "Smax_Robinson", #comparison to top corr
                  "swDensRob_avs", #top corr
                  "BO22_icecoverltmax_ss",#top corr ax2
                  #"BO22_icecovermean_ss",#top corr
                  "BO22_dissoxmean_bdmean",#top corr
                  #"BO22_dissoxltmin_bdmean",#top corr
                  #"BO22_carbonphytoltmin_bdmean",#top corr - no clear gradient in ordisurf
                  "BO22_ppltmin_ss", #top corr
                  "X.y", #comparison to Y
                  "Y", #top corr
                  "spd_std", #top corr ax2 (blended model)
                 # "CSpdsd_Robinson", #comparison to top corr ax2 (blended model)
                  "mud", #highest sed var ax1 + corr
                  "gravel",#highest sed var ax1 - corr
                  "BO22_silicateltmax_bdmean", #just under top corr ax1
                  "bathy" #intuitive for comparisons
                
  
)]

colnames(env_os_m_envfit)<-c("T", #top corr
                  "sMx", #top corr
                  "SmaxR", #comparison to top corr
                  "swDensR", #top corr
                  "icecovmax",#top corr ax2
                  #"icecovav",#top corr
                  "dissoxav",#top corr
                  #"dissoxmin",#top corr
                  #"BO22_carbonphytoltmin_bdmean",#top corr - no clear gradient in ordisurf
                  "ppltmin", #top corr
                  "X", #comparison to Y
                  "Y", #top corr
                  "spd_std", #top corr ax2 (blended model)
                 # "CSsd", #comparison to top corr ax2 (blended model)
                  "mud", #highest sed var ax1 + corr
                  "gravel",#highest sed var ax1 - corr
                  "SiLtmax", #just under top corr ax1
                  "bathy" #intuitive for comparisons
                 )

## Envfot plot
gg_envfit(ord = ord,
          env = env_os_m_envfit,
          pt.size = 1)

## Envfit analysis

ef <- envfit(ord = ord,
             env = env_os_m_envfit,
             # na.rm = TRUE
             )
efDF <- as.data.frame(scores(ef,
                             display = "vectors"))
```

##### Save the plot
```{r}
ggsave(filename = file.path(dataPath,"outputs/Barents_below100_EnvFit_man_sel_cln_domean.png"),
       device = "png",
       dpi=300 )
```
### Categorical envVar visualised on the mdsplots

#### use dataset with categorical var included

```{r}
#SampID <- env_sort$SampID

env_vis<-env
env_vis$gnmds1 <- otu_6$gnmds1
env_vis$gnmds2 <- otu_6$gnmds2

env_vis$dca1 <- otu_6$dca1
env_vis$dca2 <- otu_6$dca2
```

#### gnmds w mld mean - bathy
```{r}
dca_int <- ggplot(data = env_vis,
                     aes(x = dca1,
                         y = dca2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("Interactive DCA sample ID plot",
          subtitle = "First run") +
  geom_point(aes(colour = factor(SampID))) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")

ggplotly(dca_int)
```





#### gnmds w mld mean - bathy
```{r}
p_mld <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by proximity to mixed layer depth",
          subtitle = "First run") +
  geom_point(aes(colour = MLDmean_bathy)) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")

p_mld
```

#### gnmds w sedclass
##### deal with sedclass codes
```{r}
env_vis<- env_vis %>% 
  mutate(
    sedclassName = case_when(
            sedclass == "1" ~ "SedCoverR",
            sedclass == "5" ~ "Rock",
            sedclass == "20" ~ "Mud",
            sedclass == "21" ~ "MwBlock",
            sedclass == "40" ~ "sMud",
            sedclass == "80" ~ "mSand",
            sedclass == "100" ~ "Sand",
            sedclass == "110" ~ "gMud",
            sedclass == "115" ~ "gsMud",
            sedclass == "120" ~ "gmSand",
            sedclass == "130" ~ "gSand",
            sedclass == "150" ~ "MSG",
            sedclass == "160" ~ "sGravel",
            sedclass == "170" ~ "Gravel",
            sedclass == "175" ~ "GravBlock",
            sedclass == "185" ~ "SGBmix",
            sedclass == "205" ~ "S/MwB",
            sedclass == "206" ~ "S/MwG/B",
            sedclass == "215" ~ "SGBalt",
            sedclass == "300" ~ "HardSed",
            sedclass == "500" ~ "Biogenic"
                        
    )
  )
```

###### colour palette to cope with up to 25 categorical colours
```{r}
c25 <- c(
  "dodgerblue2", "#E31A1C", # red
  "green4",
  "#6A3D9A", # purple
  "#FF7F00", # orange
  "black", "gold1",
  "skyblue2", "#FB9A99", # lt pink
  "palegreen2",
  "#CAB2D6", # lt purple
  "#FDBF6F", # lt orange
  "gray70", "khaki2",
  "maroon", "orchid1", "deeppink1", "blue1", "steelblue4",
  "darkturquoise", "green1", "yellow4", "yellow3",
  "darkorange4", "brown"
)
```




```{r}

p_sed <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by sediment class",
          subtitle = "First run") +
  geom_point(aes(colour = factor(sedclassName))) +
   scale_colour_manual(values=c25)+
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")+
  guides(colour=guide_legend(ncol=2))

p_sed
```

#### gnmds w lanscape
##### deal with sedclass codes
```{r}
env_vis<- env_vis %>% 
  mutate(
    landscapeName = case_when(
            landscape == "1" ~ "Strandflat",
            landscape == "21" ~ "ContSlope",
            landscape == "22" ~ "Canyon",
            landscape == "31" ~ "Valley",
            landscape == "32" ~ "Fjord",
            landscape == "41" ~ "DeepPlain",
            landscape == "42" ~ "SlopePlain",
            landscape == "43" ~ "ShelfPlain",
            landscape == "431" ~ "shallowValley"
    )
  )
```


```{r}

p_land <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by landscape class",
          subtitle = "First run") +
  geom_point(aes(colour = factor(landscapeName))) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")+
  guides(colour=guide_legend(ncol=2))

p_land
```


#### Gnmds w gmorph
```{r}

p_gmo <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by landscape class",
          subtitle = "First run") +
  geom_point(aes(colour = factor(gmorph))) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")+
  guides(colour=guide_legend(ncol=2))

p_gmo
```


```{r}
cat_var_plots<-p_mld+p_sed+p_land+p_gmo
```
##### Save the plot
```{r}
ggexport(cat_var_plots,
          filename = file.path(dataPath,"outputs/Barents_gnmds_catvar.png"),
          width = 1000,
          height = 800)
```

#### Sample identification in the mdsplot

```{r}
p_gmo <- ggplot(data = env_vis,
                     aes(x = gnmds1,
                         y = gnmds2)) +
  theme_classic() +
  coord_fixed() +
  ggtitle("GNMDS coloured by sample",
          subtitle = "First run") +
  geom_point(aes(colour = factor(SampID))) +
  geom_vline(xintercept = 0,
             linetype = 2,
             colour = "lightgray") +
  geom_hline(yintercept = 0,
             linetype = 2,
             colour = "lightgray")+
  guides(colour="none", size="none")

ggplotly(p_gmo)
```

